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Weighted Least Squares in Integrated Galton--Watson Processes: Intercept Inference and Optimal Weights
In integrated Galton--Watson processes with immigration, Wei and Winnicki (1990) fitted weighted least squares (WLS) with weights $(1+X_{t-1})^{-1}$ and left open the asymptotic distribution of the resulting intercept estimator in the recurrent case. Lu (2026) bypasses this difficulty by proposing t
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